Using "AT+TEST=TXLRSTR" sub-command for Lora-E5, but not work

Hi,

I’m using Lora-E5 in test mode for send a string. Following the sequence of the data sheet of the commands for the test mode. I send the AT command below:

AT+MODE=TEST
AT+TEST=?
AT+TEST=RFCFG,434,SF9,125,12,12,20,OFF,OFF,OFF
AT+TEST=TXLRSTR, “TEST”

and I get the following responses:
+MODE: TEST
+TEST: STOP
+TEST: RFCFG F:868000000, SF7, BW125K, TXPR:8, RXPR:8, POW:14dBm, CRC:ON, IQ:OFF, NET:OFF
+TEST: RFCFG F:434000000, SF9, BW125K, TXPR:12, RXPR:12, POW:20dBm, CRC:OFF, IQ:OFF, NET:OFF
+TEST
+AT: ERROR(-12)

As can be seen, the last send command does not work, in fact if I consult the mode it is configured in ABP automatically:
+MODE: LWABP

That is why it returns the error -12, since the sub-command is not available in that mode.

However when I use the sub-command to receive the data arrives. So the configuration with the sub command AT+TEST = RFCFG works.

Has anyone tried to send this command?
What could be the problem?

BR,